Sampling apparatus



July 6, 1926.

A. G; M GREGQR Y SAMPLING APPARATUS Filed A ril 19, 1924 6 sheets-Shoot1 Y July 6, 1926,

A. G. MCGREGOR SAMPLING APPARATUS Filed April 19, 1924 6 sheets-sheet 2July 6 1926.

. A. -(3. MGREGOR smmme APFARATUS Filed April 19, 19 24 6 Sheets-Sheet 5July 6 A. G. MCGREGOR SAMPLING APPARATUS Filed April 19, 1924 I 6Sheets-Sheet 5 Inue niar:

July 6, 1926.

A. G. M GREGOR SAMPLING APPARATUS Filed April 19, 1 924 6 Sheets$heet 4A. G. M GREGOR SAMPLING APPARATUS Filed April 19; 1924 'July .6

6 Sheets-Sheet 6 Z Zr WM 2 a Patented July 6, 192%.

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" f SAMPLING Animat "'A pneation filed April 19, 1924. Serial 1%.707,628. i

= 'This invention relates to an apparatus or machine for sampling ores,or the like,

which will work more conveniently "and-to -better advantage than thesampling ma? chines. at present in use, in ore mills,

In an ordinary ore sampling mill, such as are now generally in use, a;ten or twenty per cent sample of the coarse ore del vered to the mill istaken at the top of the mill I" 10 in some such sampler as the Brunton,V'ez in, 'Snidertetcx llhe ore is'crushedfin a sub sequent crushing;machine: and vanother sample'isjtaken of the ore discharged from thecrushing machine. gA second samplefl is further c'rushed byasecond'crushing ma; chine. Athirdfsample is takenof the ore dischargedfrom the latter machine, and this. is delivered to athi'rd crushingfnaf. chine A [sample is taken of the product 2 from the third crushingmachine and is usually: delivered to a sample safe or hopper.

In sucha 'mill each sampler cuts anfapproximately definite percentage ofthe material fed to it, and no-change can be made. 0

without installing a diflt'erent'sampler,which is not practical inordinary mill operation, I and is not resorted to. 4 3O vSuclrsamplersasthose suggested have 7 sampler for collectingthe sample. In order toget an accurate sample itis necessary.

that the sampler collect a uniform section through the stream of oreflowingto it, and r this requires that the'slots or openings in the'sampler be large enough so thatfthc coarsest material coming-to v itwill not be" prevented from passing through-and so that iaflproperfamount of coarsematerial wilL pass intothe sampler; In usualpractice the width of the sample opening must be several times thediameter of the coarsest-ore fed,

to it; As the diameter of the usualsamp ler width of the opening amountsto usually.

scribed by the sample slot.

the sample finer before taking the next sample, and with large amountsof ore pe lot, and with this large proportion of sample} reat amount ofcrushing is wiredn t e sampling mill: H

in vthepercentage taken by the sampler slots or openings in theperiphery of the *of the type suggested is not greaterthan; about 60inches, it results that, in orderto get aproper opninglfor coarse ore,the

about ten per cent of thecircumference de-* Oftent mesit is twenty percent. It is necessary to -crusu W fQftentimes' in" order to cut" downthe amount-0f crushlng in thesampling mill, the sample Jopen ng 1Smade'narrower than it should be for accurate resultsfand 'for getting pp P QP f OD of coarse ore. the coarse-ore willnot a alyig Very often thesame'as' the fine. In an ordinary-Sam; pling 111111 the severalsampler'sfre'qui thei 1" belts and pulleys on'eachfloor; The present owndrives which increases-the number of mechanical ore samplers in use,suchfas" those mentioned, Wll'lnot-operateon stic y f ores, suehas"fiotationfconcentrates.

the percentage-of sample to' be varied. from t1me to time. large lotszof 'o'res'it' is not necessaryto cut as big a percentage on smalllots. Another object 'is-lto get small percentage] sample -ofcoarse oreand yet have sufficient width ofbucket in order.

o g an fl Q s mplei' I accomplish .j e1P rP "Of "my. nve o i to en l 7this having a sample' bucket with a" (50111 l l p r i y Wid pen top,andwvhich is;

icaused to travel on a much larger circle than inbe fore referred to.

is common in samplers of the types here-,

A further objectis to cut samples on the various floors of a samplingInill'WitlTa self-contained machine hav ng only one driv' In theaccompanying drawings 'Fig, .1 is.

an endwise elevation of a sampling mill having several floors fittedwith a preferred form ofsampling and reducing apparatus.-

I l I Fig. 1s "a sidewise 'elevatioIl.,,Q-fJthe same, show ng thesampling andyreducing ap paifatus in duplicate. Figs. .3, 4, 5,. 6 and;

7 are detail views of-sampling buckets, their carrying 'armslandattached parts. Figs isa detail plan v1ew, and F ig.'9 a detailelevation of "the lbujcket turning cam ridgei, ,Fig. 10 1s a diagrammatc view illustrating l the turning movement of a sampling bucket,

Figs. '11 and 12 are enlarged detail views j of the Jaeger'samplershownfin Figs. land 2.

Referring to the drawings, 12 denotes a dumping miXer and the Vezinvertical shaft having a stepped hearing .at i 13 at its lower end andhavingsuitable bear-:-

ings in theseveral floors ofjth'e mill. The 'shaft 12 is driven fromamotor .14, they motor shaft carrying a. bevel pinionflfi nected withthe shaft 13 and I protected by a safety housing 17.; V

'lim 1 meshingwith a b'cvehgear 16 rigidly con- 1 V the preferred-farm tfitheinventienil mi rie's several sets of arms 18 to each of whichisattached, preferably by a knuckle joint pivot 19, 3a rotatably mountedsampling bucket 20 each sampling bucket being connected with a sleeve21' mounted ona jouring it from its supporting attachment to an nal rod22' preferably formed integral with a yoke 23 forming part of theknuckle joint 7 pivot.19. The yoke 23 has, integral therewith, aninwardly extending arm 2a through theinner end 2480f which passes alocking -pin 2-5 having a bent-over end part 25Tarranged to enter arecess in the outer face 1 of a lug 26011 the arm 18, so as tohold thesaid arm in working posit on; but when it i's'desired to throw .abucketout or working position thelocking pin 25, passing through i a sleeve'27on said arnninay, by'a proper manipulation of a handled locking nut 28,

be loosened and withdrawn so that the pive .otally fmountedbucket may bedisplaced from or moved out of working 1.1. 1 1 :1 shown in dot-Led nnesin'r o.

Each bucket 1201s prov ded 7 roll 29 arranged tofengage a curved camposition, as

ridge 30 mounted-on a sample hopper 3 1,

81* and 31P,, so that asthe shaft rot-ates,

carrying the buckets 20 around with it, each bucket, when it arrivesover a sample hopper, will by engagement or the cam roll 29' withtheisaid cam ridge 30, be turnedupside down'so as to empty its conten tsInf/O a H 1 V buckets 1s dumped into the hopper 31 and sample hopper.

To insure a proper discharge of the sa m )les" from the sam )lingbuckets 1 arare each furnished with abayonet-shaped scraper or cutter32, the inner portion or the shank 32 of said scraper or cutter being,approximately at a right, angle to the body 32. The shank 32is'secured'by an attaching screw 33ftoa journal rod 22, on which asleeve 21, rigidly connected withai same pling ,1 bucket 20, is mountedfor turning movements, and with which 'JOHIHZLl rod the scraper orcutter- 32, 32 is rigidly connected,

so that as the sampling bucket is turned upside down to discharge-itscontents the said scraper or cutter will remain stationary and" Willthus assist in clearing the'said bucket of its contents. J V I I V Theore to; be sampledis discharged ironr a conveyor 84: into a hopper orchute 35 at the top of the mill and beneath which hopper or chute thesampling buckets 20 are carried tit-intervals. In the form oftheinvention herein illustrated there are Jourmaterial bein dischar ed fromthe ho er percentage ofsample material from the or "chute I If, howeverit be desired to take afless'er with cam,

sampling buckets of each set were in opera tion one ormore or saidsampling buckets may be thrown out of operation by loose-narnr 18,- anddisplacing it from Working position, as indicated by dotted lines in hatportion of the stream otmaterial being discharged from the chuteorhopper. 35cwlnch1s not carr ed away bytheisampling buckets 20, fallsinto' a [reject recep tacleor chute 38. from which it may be .dis-

chargedito conveyor 37 and be carried away to any suitable place ofdeposit; The

ore sample which has been segregated from 7 the stream, or massofma'terial discharged from the hopper 35 and dumped into the hopper 81 bythe sampling buckets is ,;con

veyed by suitable means, as bya chuteSS to a crushing mill 38 which may;behdriven from a motor 39, and the, product from said mill passes into ahopper 22 beneathwhich the sampling buckets'of a .second'set pass atintervals,-cutting through the stream of iiaterial discharged from saidhopper '22. Thereject materialnot beingtaken by this second setotsampling buckets passes down- I ward through a chute 40; while thesample material from this second set of sampling passes thence throughachute ll to a roller crushing mill 42 for-further reduction, saidcrushing mill being driven froma motor .43. The products from thecrushing mill 42 pass into a hopper 44: beneath which sam pling bucketsof a third set pass atin- 'tervals, said sampling buckets dumping theircontents into the hopperfil while-the. material discharged from the saidhopper a l, not taken by said sampling buckets, passes into a rejecthopper 45, and thence through a chute; 46 which discharges. onto erablybe of the Jaeger typelsuchf shown:

in the Jaeger Patents Nos; 1,322.57?) and 1 414548, so that the samplemateriahnow properly reduced, may be thoroughly mixed; The mixeris'arranged'toi dischargeinto a trough or chute 51 which in turndischarges into a'hopper 52 beneath which rotates a VeZin'sampler hopper53 Vofvwell known form, said sampler taking any desired proportion ofthe material discharged from the 1 hopper 5 2and discharging it into asample bucket or receptacleel The material from the hopper 52, not takenby the sampling hopper 58?, is discharged into a reject chute 'whence itpasses into a chute" material passing'fromithe uppermost hop perq35 tothereceptacle 36 ,"as'also'the re- ,1. jected material from the hoppers22 and- 56 discharging onto the reject conveyor.

-' From the foregoing it' will be apparent that the improvedwsanfiplingapparatus provides means, by releasing-one or more-of thehorizontally rotated open-topped sample buckets or receptacles anddisplacing it or them from working position, as indicated in dottedlines in Fig. 3, or otherwise,'bywhich the percentage of sample materialtaken from a stream of material being de-i livered maybe varied, asdesired; and this feature of the-invention may of"course be utilized inconnection' with a single set of horizontally rotating samphngbuckets orreceptacles, as will be understood.

The Operation ofturningthe open-toppe sampling buckets or receptaclesupside down for dumping" will be readilyunderstood from the diagrammaticview Figgl O, "which shows, in dotted lines,a sampling bucket indifferent progressive positionsas it is turned.

fordumping', and then restored to receiving position, by reason of the"contact ofthe cam roll 29 with the horizontally curved cam ridg'e'BO asthe bucket carried around" horizontally.

Also'the featureof providing a dumping mixer for thoroughly mixing thesample ma terial which has beenproper-ly reduced, and.

thereby rendering'the same'practically homogeneous, may beused' inconnectlon with .a single sampler, ora single set of sampling buckets orreceptacles, as will be understood.

In the operation oithesampling appa-- ratus arranged, as SllOWIl lIlF1gs.;1and 2 in a sampling mill having several floors, and

in'which' the vertical shaft '12, having a s ngle drive, carries severalsets of horizontal arms '18 at different levels, and which arms are eachprovided with an open-topped sampling bucket or receptacle 20, arrangedV to be turned relativeto saidarms, the "upper set ofsam'pling buckets,as theyarerotated horizontally,1cut through the stream of ma- I 'terialdelivered-from the hopper 35 to which hopper such material is+delivered"by the conve orsa, and the'sample material passing into said buckets orreceptacles. is dumped into'the upper hopper 31 by virtue of theengagement of the cam'rolls 29 on the bucketsQO with acain" ridge 30 onthe hopper The 'material from the hopper 31 is next delivered to thecrushing. mill 38 through which it passes to a hopper 22 ofmaterial fromhopper 44, and dump ing itinto the hopper31 The rejected 4L4, is carriedaway through the chutes-heref inbefore described.

ple material-is taken fronrthe'streami'of It willthus be undera stoodthat while a certain quantity of sain ing samplingbuckets, and" thesample materialibefore iit rea'ches the hopper 31 is again still furtherreduced bytjhe third or lowermost set of'sampling.bucketsor-receptacles. Thus the quantityofsample materialfinally delivered tothe hopper 31 is small in quantity relative to theamountof samplematerial taken by the uppermost set of sampling buckets. a 1

v As ore samplingoperations areat present,

practiced, the sample material collected in a sample safe orhoppersometimesamounts to'several: thousand pounds, and'the operat on ofreducing thislarge'quantity of sam Siderableinaccuracy in the samples;-"By 'ple material down: to avsample of say fiity 7 pounds, by fc'oning..or quartering, involves a great deal of'labor and there is often con-;

using ainixer asoles cribed the, sample'mate rial isrendered-practically homogeneous, as

above referred to, and by using a Vezin" sampler, as hereinbeforedescribed, and which divides the reduced and: WelLmi'xed samplematerialinto any desired'reduced.

quantity, much labor will be'avoided'and tofore. i e V t The inventionis not to be understood as being limited to the-details herein sh'ownrand more accurate results obtainedthan here described, as such "detailsmay bevaried widely, within the province of mechanical skill, withoutdeparting fromthe essenceorscope of the invention-as the same isdefinedjby the claims hereunto appended. f N

: Having thus described myinventions ,1

claim and desire to'secure byLetters Patent L In a sampling apparatus,the .c ombina-.

tion with a horizontally rotating openetopped sample receptacle having:a curved bottom, and a verticalrotating shaft by, which, saidreceptaclefis carried, of means for turning. said receptacle' upside donJfOrJ dumping,

and a cutter or scraper mounted withinsaid receptacle andstationaryrelativethereto, so:

as to assist in'clearing said receptacle when the latter is turned fordumping.

2. In a samplingapparatus, the conibination with avertical rotary shafthaving a:

plurality of horizontal arms, sample receptacleseachhaving apivotedconnecti'on with one of said arms,' releasable means forholdingsaid-receptacles :rigdjd with said-arms, but

permittingv any desire hum-beret said reeepf tacles to be displaced fromtheir working positions to vary the percentage of sample taken from asupply of" descending material, and means for turning said samplereceptacles for, dumping.

3. In a sampling apparatus,the combina-' tion, with a vertical. rotaryshaft having a plurality of horizontal arms, sample-re ceivingreceptacles each havinga pivoted connection with one of said arms,releasable means for holding: said receptacle rigid with said arms, butpermitting any desired number of said receptacles to be displaced from?their working position to vary the percentage of sample taken from asupply of descending material, a sample receiving i hopper, and meansfor emptying said receptacles asthey pass over saidhopper.

4. In a sampling apparatus,- the combination with sampling means, of amixer into whichrthe segregated sample material isdischarged, so thatsaid materialwill is thoroughly mixed and thus be rendered practicallyhomogeneous o .7

511 11 a sampling apparatus, the combination with sampling. means, of acrushing mill through which the segregated sample is passedfand a mixerinto which the crushed sample is discharged, so that said sample will bethoroughly mixed and, thus be rendered practically homogeneous V 6. In asampling apparatus, tne'eombinationwith sampling means, of a crushing 7be practically a true sample of the mixture.

tion with sampling means, of a crushing mill and a grinding mill throughwhich the sample material is passed,a batch mixer into whi ch thecrushed andground sample mill and al grindingmill through which thesegregated sample material is passed, anda mixer-into which the'crushedand grounr'l sampl material is discharged, so that said sample materialwill be thoroughly ,mixed and thus be rendered pract cally homogeneeousr V 7. In a sampling plant having successive mechanical samplers'andcrushing machines atdifi'erent levels, a sample safe or hop-V percontaining the segregated sample cut from the lowermost crushingmachine, in

combination with a mechanically operated batch mixer for receiving andmixing the accumulated contentsfrom' said sample safe orhopper.

8. In a sampling plantvhaving successive mechanical samplers andcrushing machines at different levels, asample. safe or hoppercontaining: the sample cut from the lowesmost crushing machine, incombination with a mechanically operated batch mixer forreceiving' andthoroughly mixing; the accumulated contents from said sample safe orhopper, so that: each small quantity of the mixed material selected: atrandom will 9. In a sampling apparatus, the'combinamaterial isdischarged, so that said materialwill be thoroughly mixed and thus berendered practically homogeneous, and a dividing sampler for reducingthe quantity of the mixed material 10. In a sampling mill, thecombination with a vertical shaft; extending through several floors ofsaid mill, and means for rotating said shaft, of a plurality of sets ofhorizontal arms fixed tosaid shaft at" differentlevels, samplingbucketsor receptacles carried by said arms, means for emptying saidsampling buckets or receptacles' as they are rotated horizontally, asample-' receiving hopper-beneath each set of samplingbuckets' orreceptacles, a crushing mill through which the sample mater-ial from theupper sample-receiving hopper is passed, a grinding mill through whichthe crushed sampled material from the next lower sample-receiving hopperispassed, anda dump ing batch mixer into: which crushed" and groundsample material from the lowermost sample-receiving hopper isdischarged.

11. In a sampling mill, the combination.

with a vertical shaft, extending through several floors of said mill,and means for rotating saidfshaft, of a plurality of sets of horizontalarms fixed to saidv shaft at different levels, samplingabuckets or recep.tacles carried by said arms, means for emptying said sampling,bucketsor receptacles as they are "rotated horizontally,asamplereceiving hopper beneath each set of sampllng buckets orreceptacles, a. crushing mill through which the samplematerial from theupper sample-receiving hopper is passed, a grinding .mill through whichthe crushed, sample material from the next lower samplereceiving hopperis passed, a dumping batch mixerinto which crushed and ground sans plematerial from the lowermost sample receiving hopper is discharged, andmeans' for carrying away the rejected material from the points at whichthe several sets of sampling bucketsor receptacles-rut zontal arms fixedto said? shaft at different levels, sampling buckets or receptacles carried by said arms, means for emptying'said sampling buckets as they arerotated horizontally, a sample rec-eiving hopper beneath each set ofsampling bucket-s or receptacles,

a crushing mill through which the sample;

material from the upper sample-receiving hopper is passed, a grindingmill through which the crushed sample materialfrom the; secondsample-receiving hopper is passed, a dumping mixer into "which crushedand. ground sample material from the lowermost sample-reoeiving hopperis discharged, and

' a dividing sampler for finally reducing the sampled material to adesired and relatively small quantity. V

13. In a sampling mill having several floors, the combinationwith avertical shaft extending through several floors, a plurality of sets ofhorizontally rotating, open-topped dumping sampling buckets connectedwith said shaft at diflerent "levels, eo-operating 1o I means fordiverting the material downward through the mill and feeding it to thediffer- ALEXANDERGRANT MCGREGOR.

